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//! Mapper and mapped key-value types
use crate::range::Range;
use crate::tuple::Tuple;
use crate::KeyValue;
/// [`Mapper`] represents the behaviour of a mapped range read.
///
/// [`Mapper`] can be converted from and into [`Tuple`].
#[derive(Clone, Debug, PartialEq)]
pub struct Mapper(Tuple);
impl From<Tuple> for Mapper {
fn from(t: Tuple) -> Mapper {
Mapper(t)
}
}
impl From<Mapper> for Tuple {
fn from(m: Mapper) -> Tuple {
m.0
}
}
/// A mapped key/value pair.
///
/// Mapped range read operations on FDB return [`MappedKeyValue`].
#[derive(Clone, Debug)]
pub struct MappedKeyValue {
key_value: KeyValue,
range: Range,
range_result: Vec<KeyValue>,
}
impl MappedKeyValue {
/// Gets a reference to [`KeyValue`] from [`MappedKeyValue`].
pub fn get_key_value_ref(&self) -> &KeyValue {
&self.key_value
}
/// Gets a reference to [`Range`] from [`MappedKeyValue`].
pub fn get_range_ref(&self) -> &Range {
&self.range
}
/// Gets a reference to [`Vec<KeyValue>`] from [`MappedKeyValue`].
pub fn get_range_result_ref(&self) -> &Vec<KeyValue> {
&self.range_result
}
/// Extract [`KeyValue`] from [`MappedKeyValue`].
pub fn into_key_value(self) -> KeyValue {
self.key_value
}
/// Extract [`Range`] from [`MappedKeyValue`].
pub fn into_range(self) -> Range {
self.range
}
/// Extract [`Vec<KeyValue>`] from [`MappedKeyValue`].
pub fn into_range_result(self) -> Vec<KeyValue> {
self.range_result
}
/// Extract [`KeyValue`], [`Range`] and [`Vec<KeyValue>`] from
/// [`MappedKeyValue`].
pub fn into_parts(self) -> (KeyValue, Range, Vec<KeyValue>) {
(self.key_value, self.range, self.range_result)
}
pub(crate) fn new(
key_value: KeyValue,
range: Range,
range_result: Vec<KeyValue>,
) -> MappedKeyValue {
MappedKeyValue {
key_value,
range,
range_result,
}
}
}